Efficient folded ngram frequency adder
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..97ca101
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,154 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>groupId</groupId>
+    <artifactId>nGrammFoldCount</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.release>11</maven.compiler.release>
+        <jackson.version>[2.10.3,)</jackson.version>
+    </properties>
+
+    <build>
+        <resources>
+            <resource>
+                <directory>src/main/xml</directory>
+                <includes>
+                    <include>**/*.xml</include>
+                </includes>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.1.1</version>
+                <configuration>
+                    <failOnError>false</failOnError>
+                    <source>${maven.compiler.release}</source>
+                    <javadocExecutable>${java.home}/bin/javadoc
+                    </javadocExecutable>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>javadoc-no-fork</goal>
+                            <goal>jar</goal>
+                        </goals>
+                        <configuration>
+                            <failOnError>false</failOnError>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <index>true</index>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>dependency/</classpathPrefix>
+                            <mainClass>org.ids_mannheim.TotalNGram</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <!-- or whatever version you use -->
+                    <release>${maven.compiler.release}</release>
+                    <source>${maven.compiler.release}</source>
+                    <target>${maven.compiler.release}</target>
+                    <showDeprecation>true</showDeprecation>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>info.picocli</groupId>
+                            <artifactId>picocli-codegen</artifactId>
+                            <version>4.2.0</version>
+                        </path>
+                    </annotationProcessorPaths>
+                    <compilerArgs>
+                        <arg>-Aproject=${project.groupId}/${project.artifactId}
+                        </arg>
+                    </compilerArgs>
+                </configuration>
+                <executions>
+                    <!-- Replacing default-compile as it is treated specially by maven -->
+                    <execution>
+                        <id>default-compile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <!-- Replacing default-testCompile as it is treated specially by
+                      maven -->
+                    <execution>
+                        <id>default-testCompile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>java-compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>java-test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>testCompile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <archive>
+                        <index>true</index>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>dependency/</classpathPrefix>
+                            <mainClass>org.ids_mannheim.TotalNGram</mainClass>
+                        </manifest>
+                    </archive>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/gnu.getopt/java-getopt -->
+        <dependency>
+            <groupId>info.picocli</groupId>
+            <artifactId>picocli</artifactId>
+            <version>4.2.0</version>
+        </dependency>
+        <dependency>
+            <groupId>com.vdurmont</groupId>
+            <artifactId>etaprinter</artifactId>
+            <version>2.0.0</version>
+        </dependency>
+    </dependencies>
+</project>
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